I have taken Cytomel or a generic for a number of years without any identified issue with it. From what I have read
Cytomel is the only med with no known side
effects. The symptoms that people report when taking it are most likely due to inadequate levels of Free T4 and/or Free T3, low B12, low D, or low ferritin. And of course you are now aware of the need for cortisol levels to be optimal, in order to successfully take T3 meds.